schooldays vs youth

schooldays

noun
  • The period of one's life when one attends school, particularly, primary school (as opposed to college days); one's youth. 

youth

noun
  • The part of life following childhood; the period of existence preceding maturity or age; the whole early part of life, from childhood, or, sometimes, from infancy, to adulthood. 

  • A young man; a male adolescent or young adult. 

  • The quality or state of being young. 

  • A young person. 

  • Young persons, collectively. 

How often have the words schooldays and youth occurred in a corpus of books? (source: Google Ngram Viewer )